Post Malone and Morgan Wallen’s “I Had Some Help” is the first No. 1 song on Billboard’s annual Songs of the Summer chart this season. “I Had Some Help” is followed by Kendrick Lamar’s “Not Like Us,” Tommy Richman’s “Million Dollar Baby,” Shaboozey’s “A Bar Song (Tipsy)” and Sabrina Carpenter’s “Espresso” in the top five,…